Go runtime related problems in TiDB production environment About me ● Arthur Mao(毛康力), Senior Engineer@PingCAP ● TiDB core developer (top3 contributor) ● GitBook about golang internals (@tiancaiamao) not exhausted, but where is the bottleneck? Description ● The table is wide in the customer environment ○ CPU usage is higher with less columns ● The deployment does not consider NUMA ○ CPU usage is

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 1.4 The basic Unix-like work environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 1.4.1 The login . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 1.5.1 Command execution and environment variable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 1.5.2 The ”$LANG” variable management operations with the commandline . . . . . . . . . . . . . . . . . . . . . . . 50 2.2.3 Interactive use of aptitude . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Firebird Interactive SQL Utility Kamala Vadlamani, Paul Vinkenoog, Norman Dunbar, Mark Rotteveel Version 1.0, 24 December 2021 Table of Contents 1. Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 10. Setting The ISC_USER And ISC_PASSWORD Environment Variables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 11. SQL Dialects. . Contents 3 Chapter 1. Introduction This manual provides reference material for the Firebird Interactive SQL Utility (isql), and instructions on how to use it to perform tasks within the database. 

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.11 New configuration and environment management . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.12 Multi-revision cache . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 668 8.7 Environment variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 695 n/034-new_lockfiles.md • Tutorial about versioning and lockfiles 2.11 New configuration and environment management The new configuration system called [conf] in profiles and command line, and introduced

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.11 New configuration and environment management . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.12 Multi-revision cache . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 667 8.7 Environment variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 694 n/034-new_lockfiles.md • Tutorial about versioning and lockfiles 2.11 New configuration and environment management The new configuration system called [conf] in profiles and command line, and introduced

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.11 New configuration and environment management . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.12 Multi-revision cache . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 678 8.7 Environment variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 706 n/034-new_lockfiles.md • Tutorial about versioning and lockfiles 2.11 New configuration and environment management The new configuration system called [conf] in profiles and command line, and introduced

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.11 New configuration and environment management . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.12 Multi-revision cache . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 675 8.7 Environment variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 702 n/034-new_lockfiles.md • Tutorial about versioning and lockfiles 2.11 New configuration and environment management The new configuration system called [conf] in profiles and command line, and introduced

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.11 New configuration and environment management . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.12 Multi-revision cache . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 673 8.7 Environment variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 700 n/034-new_lockfiles.md • Tutorial about versioning and lockfiles 2.11 New configuration and environment management The new configuration system called [conf] in profiles and command line, and introduced

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.11 New configuration and environment management . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.12 Multi-revision cache . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 689 8.7 Environment variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 718 n/034-new_lockfiles.md • Tutorial about versioning and lockfiles 2.11 New configuration and environment management The new configuration system called [conf] in profiles and command line, and introduced

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.11 New configuration and environment management . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.12 Multi-revision cache . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 687 8.7 Environment variables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 716 n/034-new_lockfiles.md • Tutorial about versioning and lockfiles 2.11 New configuration and environment management The new configuration system called [conf] in profiles and command line, and introduced